Add fix for webpack history merge bug

src/compiler/checker.ts

@@ -8790,7 +8790,7 @@ namespace ts {
 
         function getTypeReferenceTypeWorker(node: NodeWithTypeArguments, symbol: Symbol, typeArguments: Type[] | undefined): Type | undefined {
             if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
-                if (symbol.valueDeclaration && isBinaryExpression(symbol.valueDeclaration.parent)) {
+                if (symbol.valueDeclaration && symbol.valueDeclaration.parent && isBinaryExpression(symbol.valueDeclaration.parent)) {
                     const jsdocType = getJSDocTypeReference(node, symbol, typeArguments);
                     if (jsdocType) {
                         return jsdocType;

tests/baselines/reference/noCrashUMDMergedWithGlobalValue.js

@@ -0,0 +1,14 @@
+//// [tests/cases/compiler/noCrashUMDMergedWithGlobalValue.ts] ////
+
+//// [other.d.ts]
+export as namespace SomeInterface;
+export type Action = "PUSH" | "POP" | "REPLACE";
+
+//// [main.ts]
+interface SomeInterface {
+  readonly length: number;
+}
+declare const value: SomeInterface;
+
+
+//// [main.js]

tests/baselines/reference/noCrashUMDMergedWithGlobalValue.symbols

@@ -0,0 +1,18 @@
+=== /other.d.ts ===
+export as namespace SomeInterface;
+>SomeInterface : Symbol(SomeInterface, Decl(other.d.ts, 0, 0))
+
+export type Action = "PUSH" | "POP" | "REPLACE";
+>Action : Symbol(Action, Decl(other.d.ts, 0, 34))
+
+=== /main.ts ===
+interface SomeInterface {
+>SomeInterface : Symbol("/other", Decl(other.d.ts, 0, 0), Decl(main.ts, 0, 0))
+
+  readonly length: number;
+>length : Symbol(length, Decl(main.ts, 0, 25))
+}
+declare const value: SomeInterface;
+>value : Symbol(value, Decl(main.ts, 3, 13))
+>SomeInterface : Symbol("/other", Decl(other.d.ts, 0, 0), Decl(main.ts, 0, 0))
+

tests/baselines/reference/noCrashUMDMergedWithGlobalValue.types

@@ -0,0 +1,15 @@
+=== /other.d.ts ===
+export as namespace SomeInterface;
+>SomeInterface : typeof import("/other")
+
+export type Action = "PUSH" | "POP" | "REPLACE";
+>Action : Action
+
+=== /main.ts ===
+interface SomeInterface {
+  readonly length: number;
+>length : number
+}
+declare const value: SomeInterface;
+>value : import("/other")
+

tests/cases/compiler/noCrashUMDMergedWithGlobalValue.ts

@@ -0,0 +1,9 @@
+//@filename: /other.d.ts
+export as namespace SomeInterface;
+export type Action = "PUSH" | "POP" | "REPLACE";
+
+//@filename: /main.ts
+interface SomeInterface {
+  readonly length: number;
+}
+declare const value: SomeInterface;